Mecha Sonic Series by FlameHog419 on DeviantArt

Mecha Sonic Customizer [Sonic 3 A.I.R.] [Mods]

Movie Mecha Sonic (FanMade) by tailsgene19 on DeviantArt

I get confused with their names. : r/SonicTheHedgehog

Mecha Sonic MK1 by RoBro64 on Newgrounds

Mecha Sonic MKI and MKII, Metal Sonic Wiki

MEGA _F0X on X: Just finished my model of Mecha Sonic Mk.1 in the Fighters style! HUGE thanks to @TiniestTurtles for providing the Character Select map (aswell for the camera spin), providing

Sonic Realm - Art, videos, guides, polls and more - Game Jolt

Mecha Sonic

ArtStation - Silver Sonic MK1 Redesign

SEGA Tunes: MegaDriver Re-Record MetalHog for Sonic's 25th Anniversary « SEGADriven